In fact___is a hard job for the police to keep order in such an important football matchA.it B.there C.that D.this 为什么选A
问题描述：
In fact___is a hard job for the police to keep order in such an important football match
A.it B.there C.that D.this 为什么选A
答
因为in fact后面缺主语，需要it作形式主语
答
it 作形式主语,用来替代to keep order in such an important football match,避免头重脚轻原句应该是 To keep order in such an important football match is a hard job for the police